64 lines
1.3 KiB
C++
64 lines
1.3 KiB
C++
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#pragma once
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#include <cmath>
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#include "base.h"
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namespace msdfgen {
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/// Returns the smaller of the arguments.
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template <typename T>
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inline T min(T a, T b) {
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return b < a ? b : a;
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}
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/// Returns the larger of the arguments.
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template <typename T>
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inline T max(T a, T b) {
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return a < b ? b : a;
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}
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/// Returns the middle out of three values
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template <typename T>
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inline T median(T a, T b, T c) {
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return max(min(a, b), min(max(a, b), c));
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}
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/// Returns the weighted average of a and b.
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template <typename T, typename S>
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inline T mix(T a, T b, S weight) {
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return T((S(1)-weight)*a+weight*b);
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}
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/// Clamps the number to the interval from 0 to 1.
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template <typename T>
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inline T clamp(T n) {
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return n >= T(0) && n <= T(1) ? n : T(n > T(0));
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}
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/// Clamps the number to the interval from 0 to b.
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template <typename T>
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inline T clamp(T n, T b) {
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return n >= T(0) && n <= b ? n : T(n > T(0))*b;
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}
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/// Clamps the number to the interval from a to b.
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template <typename T>
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inline T clamp(T n, T a, T b) {
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return n >= a && n <= b ? n : n < a ? a : b;
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}
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/// Returns 1 for positive values, -1 for negative values, and 0 for zero.
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template <typename T>
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inline int sign(T n) {
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return (T(0) < n)-(n < T(0));
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}
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/// Returns 1 for non-negative values and -1 for negative values.
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template <typename T>
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inline int nonZeroSign(T n) {
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return 2*(n > T(0))-1;
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}
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}
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